MIX DESIGN CONFORMING TO IS 10262,383,
SP 23 & IS 456-2000

 PROGRAM INFO / LIMITATIONS.
( Actual program is available in Super Civil CD )

This program is useful for only 20 mm & down graded aggregates. 
Maximum of two ( 2 ) fractions of 20 mm & down aggregates are allowed.
Ordinary Portland Cement { OPC }  is assumed in design of mix.
Target strength = FCK + K x SD. Where SD = standard deviation, is taken as per 
IS- 456 - 2000 Table  8 and K = tolerance factor taken as 1.65.
The preliminary estimate of the mix proportions provided by this design method, must be verified and adjusted where necessary by observing performance of the trial mix made with the materials proposed to be used.
The sand shall have a fineness modulus neither less than 2.2 nor more  than 3.2 
Some relevant useful information  are as under.
 
VALUE OF TOLERANCE FACTOR { K }
ACCEPTED PROPORTION OF LOWER RESULTS K VALUE
1 IN 2 0
1 IN 5 0.84
1 IN 16 1.00
1 IN 10 1.28
1 IN 15 1.50
1 IN 20 1.65
1 IN 40 1.86
1 IN 100 2.33
1 IN 200 2.58
 
 WORKABILITY OF CONCRETE
SR NO. PLACING CONDITIONS DEGREE OF WORKABILITY  COMPACTING FACTOR/SLUMP
1 SHALLOW SECTION WITH VIBRATION VERY LOW 0.75 TO 0.80    SLUMP= 0-25 mm
2 LIGHTLY RC SECTION WITH VIBRATION LOW 0.80 TO 0.85      SLUMP = 25-50 mm
3 -DO- BUT WITHOUT VIBRATION MEDIUM 0.85 TO 0.92       SLUMP = 75-100 mm
4 HEAVY RC SECTION WITH VIBRATION MEDIUM 0.85 TO 0.92       SLUMP = 75-100 mm
5 -DO- WITHOUT VIBRATION HIGH ABOVE 0.95 SLUMP=150-175mm
 
BULKING OF SAND FOR VARIOUS MOISTURE CONTENTS { % }
MOISTURE % FINE SAND MEDIUM SAND COARSE SAND
1 16 7 6
2 26 16 12
3 32 22 15
4 36 27 17
5 38 29 18
6 37 28 18
7 35 26 16
10 32 22 12
 
GRADING REQUIREMENTS FOR FINE AGGREGATE AS PER IS: 383
IS SIEVE MM % PASSING BY WEIGHT
GRADING ZONE I GRADING ZONE 2 GRADING ZONE 3 GRADING ZONE 4
10 100 100 100 100
4.75 90-100 90-100 90-100 95-100
2.36 60-95 75-100 85-100 95-100
1.18 30-70 55-90 75-100 90-100
600 MICRON 15-34 35-59 60-79 80-100
300 MICRON 5-20 8-30 12-40 15-50
150 MICRON 0-10 0-10 0-10 0-15
 
GRADING REQUIREMENTS FOR COARSE AGGREGATES (IS_ 383)
% PASSING FOR GRADED AGGREGATE OF NOMINAL SIZE
IS SIEVE DESIGNATION (MM) 40 MM 20 MM 16 MM 12.5 MM
40 95-100      
20 30-70 95-100 100  
16     90-100 100
12.5       90-100
10  10-35 25-55 30-70 40-85
4.75  0-5 0-10 0-10 0-10

DURABILITY REQUIREMENTS AS PER IS: 456-2000
{ maximum aggregate size = 20 mm }
EXPOSURE CEMENT CONTENT (KG/M3) MAX.W/C RATIO MIN. CONCRETE GRADE
MILD
300
0.55
M20
MODERATE
300
0.50
M25
SEVERE
320
0.45
M30
VERY SEVERE
340
0.45
M35
EXTREME
360
0.40
M40

ADJUSTMENT TO CEMENT CONTENT FOR AGGREGATES OTHER THAN 20 MM SIZE
1 NOMINAL MAXIMUM AGGREGATE SIZE ADJUSTMENT {KG/CM3}
1 10 + 40
2 20 0.00
3 40 - 30

LIMITS OF FINENESS MODULAI
TYPE OF AGGREGATE MAXIMUM SIZE OF AGGREGATE
IN MM		 FINENESS MODULAI
MAXIMUM MINIMUM
FINE - 3.5 2.0
COARSE 20 6.9 6.0
40 7.5 6.9
75 8.0 7.5
150 8.5 8.0
MIXED 20 5.1 4.7
25 5.5 5.0
32 5.7 5.2
40 5.9 5.4
75 6.3 5.8
150 7.0 6.5